Contributors AgreementContributors Agreement • March 26th, 2012
Contract Type FiledMarch 26th, 2012We certify that this study/article has no declared/undeclared conflicts of interest. Permissions for inclusion of or reproduction of any text/figures/tables or any other matter that may be perceived as not original, but is attached/included with this submission has been obtained legally and a copy of these are attached with this manuscript. If permissions were not sought or unavailable, then the text/figures/tables or any other material are adequately and appropriately sourced/acknowledged in the manuscript.